Questions: SOL-5410v Biology sec. 50 / Module 02: Life's Origins When the carbon atoms of the glucose molecule are broken apart in glycolysis and the Krebs cycle, what is the result? (1 point) CO2 and ATP C6H12O6 and H2O FADH 2 and ATP CO2 and H2O

The answer is the first one: $\mathrm{CO}_{2}$ and ATP.

Explanation for each option:

1. $\mathrm{CO}_{2}$ and ATP: This is correct. During glycolysis and the Krebs cycle, glucose (C₆H₁₂O₆) is broken down. Glycolysis produces pyruvate, which enters the Krebs cycle. Throughout these processes, carbon atoms are released as carbon dioxide (CO₂), and energy is captured in the form of ATP (adenosine triphosphate).

2. $\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}$ and $\mathrm{H}_{2} \mathrm{O}$: This is incorrect. $\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}$ is glucose, which is the starting molecule, not a product of its breakdown. Water ($\mathrm{H}_{2} \mathrm{O}$) is produced in the electron transport chain, not directly in glycolysis or the Krebs cycle.

3. FADH₂ and ATP: This is partially correct but not complete. FADH₂ is indeed produced in the Krebs cycle, and ATP is produced in both glycolysis and the Krebs cycle. However, this option does not account for the carbon atoms being released as CO₂.

4. $\mathrm{CO}_{2}$ and $\mathrm{H}_{2} \mathrm{O}$: This is incorrect. While CO₂ is produced in the Krebs cycle, water is primarily produced in the electron transport chain, not directly in glycolysis or the Krebs cycle.

Summary: The correct result of breaking apart the carbon atoms of the glucose molecule in glycolysis and the Krebs cycle is the production of $\mathrm{CO}_{2}$ and ATP.